var hk_nav =document.getElementById('hk_nav').children;
var lv_hk =document.getElementsByClassName('lv_hk')[0].children[1].children;
for (var i =0; i < hk_nav.length; i++){
	hk_nav[i].onmouseover = function(){
		for(var j = 0;j < hk_nav.length;j++){
			hk_nav[j].children[0].classList.remove('hk_li_active');
		}
		this.children[0].classList.add('hk_li_active');
		for(var n=0;n<lv_hk.length;n++){
			lv_hk[n].style.display='none';
		}
		console.log(this);
		var vl =this.value;
		console.log(lv_hk[vl])
		lv_hk[vl].style.display = 'block';
	}
}